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321不锈钢管 - ASTM A312无缝及焊接管
快马钢铁有限公司
已认证
定制生产厂家
·
7 年
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China
China
可定制
超低价
$1600
1-49 吨
基准价
$1530
50-99 吨
4.4% 优惠
$1495
≥100 吨
6.6% 优惠
价格有效期：随行就市
付款与交货
- 交期：
- 随报价一并确认
- 包装：
- 标准出口包装
- 样品：
- 可按需提供
30毫米不锈钢棒
$2005 - $2145
1 吨 （最小起订量）
不锈钢棒
$2300
1 吨 （最小起订量）
316不锈钢圆棒
$1600
1 吨 （最小起订量）
1/4 不锈钢杆
$3900
1 吨 （最小起订量）
4英寸不锈钢圆钢
$1200
1 吨 （最小起订量）
不锈钢棒
$1200 - $1285
1 吨 （最小起订量）
316不锈钢螺纹杆
$750
1 吨 （最小起订量）
10毫米不锈钢圆钢
$1250
1 吨 （最小起订量）
8直径不锈钢圆钢
$1830
1 吨 （最小起订量）
不锈钢棒
$3980
1 吨 （最小起订量）
20毫米不锈钢棒
$1200 - $1285
1 吨 （最小起订量）
321不锈钢管
$1495 - $1600
1 吨 （最小起订量）
产品详情
321不锈钢管技术规范
| 属性 | 参数 | 描述 |
|---|---|---|
| 产品名称 | 321 Stainless Steel Pipe | 钛稳定化奥氏体不锈钢管 |
| 材料牌号 | ASTM 321 / EN 1.4541 / UNS S32100 | 国际牌号对应 |
| 标准合规 | ASTM A312, ASTM A213, EN 10216-5 | 符合主要国际标准 |
| 碳 (C) | ≤0.08% | 用于保证强度的碳含量 |
| 铬 (Cr) | 17.0-19.0% | 提供耐腐蚀性 |
| 镍 (Ni) | 9.0-12.0% | 增强延展性和韧性 |
| 钛 (Ti) | 5×(C+N) min, 0.70% max | 稳定化以防止晶间腐蚀 |
| 锰 (Mn) | ≤2.0% | 提高淬透性 |
| 硅 (Si) | ≤1.0% | 脱氧剂和强化剂 |
| 抗拉强度 | ≥515 MPa | 按 ASTM A312 的最低抗拉强度 |
| 屈服强度 | ≥205 MPa | 最低屈服强度 |
| 延伸率 | ≥35% | 50mm 标距内的延展性 |
| 外径范围 | 6mm - 914mm | 可选外径规格 |
| 壁厚 | 0.5mm - 50mm | 标准及定制厚度 |
| 长度 | 5.8m - 12m 或定制 | 标准及定制长度 |
| 温度范围 | 最高 925°C | 最高使用温度 |
| 应用 | 高温服务、化学加工、飞机排气系统 | 典型应用行业 |
| 认证 | EN 10204 3.1, ISO 9001, PED | 提供的质量认证 |
| 表面处理 | 退火、酸洗、抛光 | 多种表面处理选项 |
| MOQ | 1 ton | Minimum order quantity |
321不锈钢管 - ASTM A312无缝与焊接管
321不锈钢管是一种钛稳定化奥氏体铬镍合金管材，专为高温工况及需要优异抗晶间腐蚀性能的应用而设计。该材料按ASTM A312/A312M标准制造，广泛应用于航空航天部件、化学加工系统及高温工业装置中，在这些领域传统奥氏体牌号已无法满足要求。我们的钢厂直供能力确保无缝管和焊接管配置均具有成本效益的定价，服务于需要认证材料可追溯性和一致力学性能的制造商、工程承包商及OEM厂商。
什么是321不锈钢管？
321不锈钢管代表一种特殊的奥氏体合金，含有钛添加元素（最低为碳含量的5倍），可在焊接和高温暴露期间稳定材料，防止碳化铬析出。这种稳定化机制可防止热影响区的敏化，在800-1500°F（427-816°C）温度范围内保持耐腐蚀性，而标准304牌号在该范围内易受晶间侵蚀。根据ASTM A240化学要求，该合金成分通常含有17-19%铬、9-12%镍和0.4-0.7%钛。
321不锈钢管技术规格
我们的 321 不锈钢管库存符合 ASTM A312/A312M-21 第 6 节对无缝和焊接奥氏体管材的要求。抗拉强度满足最低 515 MPa（75 ksi），室温下屈服强度最低为 205 MPa（30 ksi）。根据 ASTM A240 中的化学成分表，碳含量控制在最高 0.08%，氮含量限制在最高 0.10%。可选尺寸范围从 1/8" 到 24" 公称直径，壁厚涵盖 schedule 5S 至 XXS，无缝产品标准长度为 20 英尺，焊接管材为 17-22 英尺的随机长度。表面处理选项包括光亮退火（BA）、酸洗钝化，或按客户规格的轧制表面。
为什么选择 321 不锈钢管用于高温应用
与非稳定化奥氏体合金相比，321 牌号中的钛稳定化在热循环环境中提供了更优越的性能优势。在暴露于敏化温度范围期间，钛优先形成稳定的碳化物，而不是让晶界处的铬发生贫化——这对于排气系统、膨胀节和承受 800-1500°F 温度的处理管道中的焊接组件来说是一个关键因素。这种材料表现出卓越的抗蠕变性能，并在高达 1600°F（871°C）的温度下保持足够的强度，使其成为飞机发动机部件、喷气发动机零件和石化重整管道的首选。该合金还表现出卓越的耐氧化性酸性能，并在 304L 证明不足的硝酸浓度中提供可靠的服务。
制造标准和质量认证
我们的 321 不锈钢管生产遵循多项国际规范，确保全球项目兼容性。主要标准包括适用于无缝管和焊接管的 ASTM A312/A312M、适用于压力容器应用的 ASME SA312，以及面向欧洲市场的 EN 10216-5 (1.4541/X6CrNiTi18-10)。每个生产批次均按照 ASTM A312 第 9 节要求进行静水压试验，试验压力按 2St/D 计算，其中 S 代表许用应力，t 等于壁厚，D 等于外径。材质试验报告 (MTR) 记录通过光电发射光谱法测定的化学成分、通过按 ASTM E8 进行拉伸试验测定的力学性能，以及通过 ASTM A262 Practice E 测试验证的晶间耐腐蚀性能。可根据要求通过 Lloyd's Register、Bureau Veritas、TÜV 或 SGS 提供第三方检验服务。
常见问题
最小起订量 (MOQ) 是多少？
我们的标准最小起订量对于无缝管库存尺寸为 500 千克，对于焊接结构为 1000 千克。定制直径和壁厚组合需要 2000 千克起订量，以支持轧机生产运行。可提供 50-100 千克的样品数量，用于材料资格认证和测试目的，并在 5-7 个工作日内加急交付。
你们提供材质试验证书吗？
是的，我们为每次发货提供全面的 EN 10204 Type 3.1 工厂测试证书，记录炉号可追溯性、化学成分分析、力学性能测试结果和水压试验确认。证书包括 PMI 验证、按 ASTM E18 进行的硬度测试以及按 ASTM E112 进行的晶粒度测定。可安排额外测试，如阳性材料鉴定、按 ASTM A999 进行的超声波检验或射线检验，并提供相应的认证文件。
典型的交货时间是多少？
无缝管的库存规格通常在订单确认后 7-10 个工作日内发货，适用于 5000 千克以下的数量。标准壁厚的焊接管在类似数量下于 10-14 天内发货。需要钢厂生产的定制规格根据尺寸、数量和当前生产计划，交货周期为 45-60 天。关键项目可提供加急处理，通过优质货运安排将大多数配置的交货时间缩短至 15-20 天。
你们能切割成定制尺寸吗？
我们拥有全面的切割和加工能力，包括公差为 ±1mm 的精密锯切、按 ASME B16.25 标准进行的焊接坡口制备，以及符合 ASME B1.20.1 规范的螺纹加工服务。定制长度切割可满足从最小 100mm 到最大 12 米单件的要求。额外的制造服务包括按指定半径弯曲、扩口和端部成型操作。所有切割操作均使用冷却液系统和适当的锯片速度，以防止加工硬化并保持材料性能。
获取 321 不锈钢管的竞争力报价
立即索取详细报价，享受我们与钢厂的直接合作关系，省去经销商加价，同时确保真实的材料认证和一致的质量控制。我们的技术销售团队提供材料选择、规格合规和应用工程方面的专业咨询，以优化您的项目需求。我们在主要工业中心保持战略库存，能够快速部署到全球各地的制造工厂。
- 通过专属客户经理提供24/7客户支持
- 免费样品用于质量评估，附认证测试报告
- 批量订单具有竞争力的价格，提供批量折扣结构
- 关于焊接工艺和热处理的专业技术咨询
立即联系我们，24小时内获取免费报价！
评分与评价
Wei Chen
Singapore
2025-07-01
Superior 321 Welded Pipe for Chemical Processing
We ordered 5.8 tons of 321 welded pipe in mixed schedules (6" SCH 40 and 8" SCH 80) for our chemical plant expansion handling concentrated nitric acid at 1250°F. Material certificates showed exceptional chemistry - titanium at 0.61%, carbon at 0.055%, and nitrogen at 0.065%, all optimal for our corrosive high-temperature environment. We conducted comprehensive testing including ASTM A262 Practice E intergranular corrosion testing, ASTM E18 hardness verification (82-87 HRB across all samples), and positive material identification on 15% of lengths. Results exceeded our expectations with zero sensitization and uniform mechanical properties. Weld seam quality on welded pipe was outstanding - radiographic inspection per ASTM E1742 showed 100% acceptance with no linear indications. Supplier provided detailed heat treatment records and cooling rate documentation critical for our process safety requirements. Delivered in 11 days with professional packaging including desiccant packets and heat-shrink end caps. This is our 6th order. Highly recommended for critical chemical processing applications requiring superior corrosion resistance and documented quality control.
Chris Martin
Canada
2025-07-26
Acceptable Quality with Documentation Delays Resolved
Decent product, some documentation issues initially resolved. Ordered 3.5 tons of 2.5" SCH 40 welded pipe (ASTM A312) for our oil sands facility upgrade project in Alberta. Material quality was acceptable - chemistry met ASTM A240 requirements with titanium at 0.48% and carbon at 0.072%. Hydrostatic testing confirmed pressure ratings per specification. However, initial shipment arrived without complete EN 10204 3.1 certificates - only 2.1 mill reports were included. After contacting supplier, they expedited proper 3.1 certificates within 5 business days via email, then couriered hard copies. Supplier acknowledged their shipping department error and offered 3% credit on next order as goodwill gesture. Material performed adequately in our 1100°F process application after 4 months of service. Suggestion for improvement: implement better quality control on documentation before shipment, especially for Canadian projects requiring full traceability. Would consider ordering again with explicit documentation requirements in purchase order, as they handled the issue professionally once notified.
John Smith
United States
2025-08-08
Perfect 321 Seamless Pipe for Repeat Aircraft Orders
Long-term partnership for aerospace-grade 321 seamless tubing supply. This is our 11th order over 3 years for various aircraft engine component projects totaling over 28 tons. Consistency is exceptional - every heat lot maintains tensile strength 525-540 MPa, yield strength 215-230 MPa, and elongation 42-48% per our internal quality requirements exceeding ASTM A312 minimums. Recent 2.3-ton order of 1" SCH 80 seamless pipe for jet engine exhaust manifolds showed titanium content at 0.58% with carbon at 0.062%, ideal chemistry for our 1500°F thermal cycling applications. Grain size consistently Grade 6 per ASTM E112, critical for fatigue resistance in aerospace service. Supplier maintains traceability back to original mill heat with complete PMI verification and radiographic inspection records. Their understanding of AS9100 quality requirements and willingness to accommodate our stringent receiving inspection protocols makes them invaluable for critical aerospace applications. Highly recommended for OEM manufacturers requiring certified material with zero non-conformance history.
Carlos Silva
Brazil
2025-08-31
Good Value for South American Market
Good value considering import logistics to Brazil. We compared quotes from 5 international suppliers and 2 local distributors for our chemical processing expansion. Their FOB pricing was competitive, and they arranged consolidated shipping reducing our freight costs by 23%. Ordered 4.1 tons of 3" and 4" SCH 40 welded pipe (ASTM A312) for nitric acid service at 950°F. Material quality met specifications with proper ASME SA312 certification and EN 10204 3.1 certificates in Portuguese translation. Delivery took 28 days including customs clearance, reasonable for international shipment to São Paulo. Minor issue with documentation - one MTR had incorrect heat number cross-reference requiring email clarification, resolved within 24 hours. Overall solid supplier for Latin American projects. 4 stars because communication during shipping could be more proactive with tracking updates, but material quality and pricing justify continued business relationship.
Ahmed Al-Hassan
UAE
2025-09-23
Premium 321 Pipe for Desert Climate Installations
Premium quality material perfectly suited for our harsh desert environment applications. Ordered 6.2 tons of mixed sizes (2" to 8" SCH 40 seamless) for a petrochemical facility expansion project in Abu Dhabi. Material certificates documented carbon content at 0.058% and chromium at 18.2%, optimal chemistry for our 1450°F process piping requirements. We conducted independent verification testing through TÜV Middle East - results confirmed superior intergranular corrosion resistance and excellent creep properties at elevated temperatures. Surface condition was outstanding with uniform bright annealed finish showing Ra values under 0.4 micrometers. The supplier provided detailed welding procedure specifications and recommended filler metals (ER321) for our fabrication team. This is our 3rd major order. Previous installations have shown zero sensitization issues in heat-affected zones after 14 months of continuous operation. Highly recommended for critical high-temperature service in Middle East industrial projects.
William Taylor
Australia
2025-10-15
Solid Quality 321 Tubing for Heat Exchanger Project
Solid quality material for our chemical plant heat exchanger renovation. Ordered 1.8 tons of 1.5" SCH 5S thin-wall tubing (ASTM A312 seamless) for elevated temperature service at 1350°F. Compared quotes from 4 Australian distributors and 3 Asian mills - this supplier offered 18% savings with direct mill pricing. Material arrived with proper ASME SA312 markings and complete test documentation showing hardness at 85 HRB, well within acceptable range. Surface finish was pickled and passivated as specified. One minor concern was packaging - some tubes had slight surface moisture requiring re-passivation before installation, though no corrosion developed. Delivery was 14 days, acceptable for our project timeline. Overall good value proposition for Australian market. 4 stars due to packaging issue, but would order again for similar applications requiring cost-effective titanium-stabilized material.
Robert Brown
United Kingdom
2025-11-06
Reliable 321 Pipe Supplier for Offshore Applications
Long-term partner for stainless steel pipe supply to our offshore platform projects. This is our 7th order over 18 months totaling approximately 42 tons of various 321 configurations. Consistency has been remarkable - every shipment meets ASTM A312 mechanical properties with tensile strength ranging 520-545 MPa and yield strength 210-225 MPa across all heat lots. Their quality control system ensures grain size consistently meets ASTM E112 requirements (typically Grade 6-7), critical for our welded assemblies in marine exhaust systems. Recent 4.5-ton order of 3" SCH 40 seamless pipe for a North Sea project arrived with complete PMI verification and ultrasonic testing per ASTM A999. Pricing remains competitive despite fluctuating nickel markets. Technical support team understands marine classification society requirements (DNV, ABS, Lloyd's). Looking forward to continued partnership for our expanding offshore fabrication division.
Hans Mueller
Germany
2025-11-28
Good Value 321 Welded Pipe for Expansion Joints
Good value for the price on our expansion joint fabrication project. We compared quotes from 6 suppliers across Europe and Asia, and their price was 12% lower than German mills while maintaining acceptable quality standards for ASTM A312 welded pipe. Ordered 2.8 tons of 4" SCH 10S with 1.5mm wall thickness. Material certificates confirmed chemistry within specification, though titanium was at lower end (0.42%) compared to seamless grades. Minor issue with one length showing slight ovality (measured 0.8mm deviation), but supplier immediately replaced it without dispute. Overall, solid choice for non-critical applications where cost matters. 4 stars because delivery took 16 days versus quoted 12 days, though quality met our DIN requirements for thermal expansion systems.
James Wilson
United Kingdom
2025-12-23
Outstanding Service for Urgent Petrochemical Project
Excellent service experience from inquiry to delivery for our nitric acid processing system. Communication was exceptional - technical sales team responded within 2 hours with detailed specification recommendations for our 1200°F reformer application. They provided professional consultation on welding procedures and suggested PWHT requirements for our 6" SCH 80 welded pipe order. Delivery was impressive - 12 days for 5 tons of material, 3 days ahead of our critical project schedule. Packaging was industrial-grade with wooden crates, plastic caps on all ends, and individual heat number tags on each 20-foot length. All pipe sections arrived without any transit damage or surface scratches. The supplier arranged third-party inspection through Lloyd's Register at no additional cost. Will definitely use for future high-temperature projects requiring rapid turnaround and technical support.
Michael Chen
Singapore
2026-01-07
Excellent 321 Seamless Pipe for Aircraft Engine Components
We ordered 3.2 tons of 321 seamless pipe (2" SCH 40, ASTM A312) for our jet engine exhaust system project. Material certificates showed titanium content at 0.52% and carbon at 0.065%, fully compliant with ASTM A240 requirements. We conducted intergranular corrosion testing per ASTM A262 Practice E and results showed excellent resistance. Surface finish was bright annealed with no visible defects or surface contamination. The titanium stabilization proved critical for our welded assemblies operating at 1400°F. Delivered in 9 days with complete EN 10204 3.1 documentation. This is our 4th order from this supplier. Quality has been consistently excellent for high-temperature aerospace applications. Highly recommended for critical thermal cycling environments.
了解供应商
可定制
超低价
$1600
1-49 吨
基准价
$1530
50-99 吨
4.4% 优惠
$1495
≥100 吨
6.6% 优惠
价格有效期：随行就市
付款与交货
- 交期：
- 随报价一并确认
- 包装：
- 标准出口包装
- 样品：
- 可按需提供
